Linux

kernel State based on NetFilter constructs SKB data packetThe previous fourth article introduces the NetFilter hook mechanism, we know that packets in the protocol stack pass through different hook points, and each hook point is NetFilter

1, the Windows system under the Implementation folder file scanning The implementation code is as follows: #include #include #include #define Testfolderpath "./" void Scanfolder (c Onst char* Folder_path); int main (int argc,char* argv[])

JDK Download path: http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html Java environment Configuration in Windows environment1. Install JDK2. Configure Environment variables2.1, Win2000, and WinXP can find "environment

Linux to get the current directory, you need to execute the following command: $ (CD ' DirName $ ';p wd) which DirName $, get the parent directory of the currently executing script file CD ' DirName $ ', enter this directory (toggle current

Linux system configuration file/etc/sysconfig-Cheung Solution If some of the files listed here do not appear in your/etc/sysconfig/directory, the corresponding program may not be installed. These files are described separately here, with a general

Linux under nice/renice command summary2010-03-30 12:58 1.1.1 Nice Command The kernel determines how much processor time the process requires, depending on the nice value of the process. The value range for the nice value is:-20 to 20. A process

Porting Environment ( red Bold font for modified content, blue bold text for special attention) 1, Host Environment: Vmare under linux5.7, 384 memory. 2, compiling the compilation environment: ARM-LINUX-GCC v4.4.3 3, Development Board: FL2440,4M

Recently in the Learning Network card driver, you need to crawl the network card to send, receive data, and then found the tcpdump and Wireshark these two tools, tcpdump is used to crawl data, Wireshark is used to analyze the data crawled, the usage

Ultra-Practical Linux/unix shortcut key rollup (development, Management) (1) (Turn) The most important platform for development and system management in a Linux/unix environment is the shell environment. The shell has a lot of very useful shortcut

A. Split description Split can be used to cut a log file, making it easier to process logs. For example, there is a 12G log, you need to delete a row of data, know the line number, but with the SED and vi relatively slow, You can cut the split

LINUX 6--installation SSH remote access control------------------------------------Overview----------------------------------- SSH (secure Shell) is a secure channel protocol, which is mainly used for remote login, remote replication and

1, directly view the permissions of the file or folder command: >>ll or >>ls-l R for Read permissions, W Write permission, x for Execute permissions The first representative file type,-the representative is a normal file, d means that the folder

It's The section, the man, page for the command was assigned to.These is split as General commands System calls C Library functions Special files (usually devices, those found In/dev) and drivers File Formats and conventions

Traceroute we can know what path the information from your computer to the other end of the Internet host is walking. Of course, each time a packet arrives at a similar destination (destination) by a similar starting point (source), the path may be

SFTP is the abbreviation for Secure File Transfer protocol, security File Transfer Protocol. You can provide a secure network encryption method for transferring files. SFTP has almost the same syntax and functionality as FTP. SFTP is part of SSH and

Setfacl, the command name, sets the file access control list, which is the ACL rule. ACLs(Accesscontrol list) areSetfacl Common Command ParametersSetfacl 2.2.51--Set File access control ListUsage: setfacl [-BKNDRLP] {-m|-m|-x|-x ...} file

A graphical interface configuration (assumed to be computer a)If your Linux installation has a graphical interface, configure it in the following ways:I have two network card, the first network card has been configured by DHCP in the previous

Linux is an operating system that is primarily managed through the command line, that is, to manage the system's operations through keyboard input commands, which are very different from the visual management of Windows systems using mouse

Shared memory is the fastest and most efficient form of interprocess communication, and when shared memory is mapped to the address space of a process that shares it, the data transfer between processes is no longer involved in the kernel, and the

When the Linux operating system generates a network failure, it should first go from hardware to software/,1, check the network cable, network card.To the machine room to check whether the two ends of the network cable is lit, the normal server